Sharp MX 3501N - Color Laser - Copier, Service Manual

Page: 75 / 448

MX3500N ADJUSTMENTS 6 – 30
1) Place a scale on the document table as shown in the figure
below.
Place a scale so that it is in parallel with the scanning direction
and that its lead edge is in contact with the document guide
plate.
Place white paper on the document table so that the scale lead
edge can be seen.
2) Enter the simulation 50-1 mode.
3) Set RRCA, LEAD, and SIDE to the default values.
4) Perform the image lead edge reference position adjustment.
Press [CLOSE] key, and shift from the simulation mode to the
copy mode and make a copy in 100% mode and in 200%
mode.
When the adjustment value of RRCA is proper, the lead edge
image from 3.0mm is not copied in either of 100% and 200%
copy scale.
If not, change and adjust the RRCA value.
(Adjust so that the lead edge image from 3.0mm is not copied
in either of different copy magnification ratios.)
Repeat the above procedures until a satisfactory result is
obtained.
5) Image loss adjustment
When the adjustment item of the image loss below is set to the
default value, it is adjusted to the standard state.
If it is not in the above standard state, or when it is set to a
desired value, change these adjustment items.
Void area: 3.0mm, Image loss: 3.0mm
When the adjustment value is increased, the image loss is
increased. When the adjustment value is decreased, the
image loss is decreased.
When the adjustment value is changed by 1, the image loss is
changed by 0.1mm.
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
OK
10-key
CLOSE
A:
A
㧦
xx
B 㧦 xx
C 㧦 xx
D 㧦 xx
㧧 RRCA
㧧 RRCB-CS12
㧧 RRCB-CS34
㧧 RRCB-LCC
SIMULATION NO.50-01
LEAD EDGE ADJUSTMENT VALUE
xx
0 99
OK
TEST
CLOSE
0
A:
A 㧦 xx
B 㧦 xx
C
㧦
xx
D 㧦 xx
㧧 RRCA
㧧 RRCB-CS12
㧧
RRCB-CS34
㧧 RRCB-LCC
SIMULATION NO.50 㧙 01
LEAD EDGE ADJUSTMENT VALUE
xx
㨇 0 㨪 99 㨉
OK
TEST
0
Item Display item Content Adjustment range Default value
A RRCA Image lead edge position
adjustment value Document lead edge reference position (OC) 0 – 99 50
B RRCB-CS12 Resist motor ON timing
adjustment Standard cassette 1 – 99 50
C RRCB-CS34 Desk 1 – 99 50
D RRCB-LCC LCC 1 – 99 50
E RRCB-MFT Manual feed 1 – 99 50
F RRCB-ADU ADU 1 – 99 50
G LEAD Image loss adjustment Lead edge image loss adjustment 0 – 99 30
H SIDE Side image loss adjustment 0 – 99 20
I DENA Void area amount adjustment Lead edge void area adjustment 1 – 99 30
J DENB Rear edge void area adjustment 1 – 99 20
K FRONT/REAR FRONT/REAR void area adjustment 1 – 99 20
100%
200%
5mm 10mm
5mm
10mm
Paper lead
edge
Scale image 3.0mm position
Display/
Item
Content
Adjustment
range
Default
value
Standard
adjustment
value
LEAD Image loss
adjustment
value Lead edge
image loss
adjustment 0 – 99 30 3.0
±
1.0mm
SIDE Side image
loss
adjustment 0 – 99 20 2.0
±
1.0mm
5mm
10mm
4 3 2 1
Paper lead edge
Copy area
Maginification ratio: 400%